Part Number: KY-037, KY037
Function: Microphone sensor module ( High Sensitivity )
Package: Module Type
The KY-037 sensor has 3 main components on its circuit board. First, the sensor unit at the front of the module which measures the area physically and sends an analog signal to the second unit, the amplifier. The amplifier amplifies the signal, according to the resistant value of the potentiometer, and sends the signal to the analog output of the module.
The third component is a comparator which switches the digital out and the LED if the signal falls under a specific value. You can control the sensitivity by adjusting the potentiometer
This sensor doesn’t show absolute values (like exact temperature in °C or magneticfield strenght in mT). It is a relative measurement: you define an extreme value to a given normal environment situation and a signal will be send if the measurement exceeds the extreme value. It is perfect for temperature control (KY-028), proximity switch (KY-024, KY-025, KY-036), detecting alarms (KY-037, KY-038) or rotary encoder (KY-026).
Technical data / Short description
1. Digital Out : You can use a potentiometer to configure an extreme value for the sonic. If the value exceeds the extreme value, it will send a signal via digital out.
2. Analog Out : Direct microphone signal as voltage value
3. LED1 : Shows that the sensor is supplied with voltage
4. LED2 : Shows that a magnetic field was detected
KY-037 Datasheet PDF